High Efficiency, Heat Output Gas Fires with Cast Inserts. Most gas fires supplied with a cast iron insert tend to be for decorative purposes only. They don't offer much in the way of heat nor are they very efficienct with 75% of the heat been lost up the Chimney. The Integra range boasts a highly efficient, realistic gas fire with a high heat of 4kw and an efficiency approaching 60%. Please find below a wide section of: High Put Cast Iron Inserts High Output Tiled Inserts High Efficiency Cast Inserts High Efficiency Tiled Inserts Cast Iron Gas Fire Inserts Tiled Cast Iron Gas Fire Inserts
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